我有带有 @ManyToOne 链接的实体,当我使用条件执行查询时,spring 使用交叉联接,但我只想在自己的列上选择。
案子:
public class Job {
@Column
private Long jobId;
@OneToMany(fetch = FetchType.EAGER)
@JoinColumn(name="creator", referencedColumnName="uid")
private User creator;
}
public class User {
@Column
private Long uid;
@Column
private String name;
}
public Predicate toPredicate(Root<Job> root, CriteriaQuery<?> query, CriteriaBuilder cb) {
List<Predicate> Predicates=new ArrayList<Predicate>();
Predicates.add(cb.equal(root.get("creator").get("uid"), 123456));
query.where(Predicates.toArray(new Predicate[Predicates.size()]));
return null;
}
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我只想创建像“select ... from job where user_id = 123456”这样的查询,但是spring执行像“select ... from job m cross join user u where m.creator = u.uid and u.uid = 123456” ”。
如何避免在 …